After using a 2015 base MacBook for the past 2 weeks, I can say that I've noticed very few scenarios where the processor was struggling. I just felt like I was using a Mac and didn't even think about it --- and again, that's on a 2015 MacBook.
If portability and ultra lightness are part of your desires, I think the 2016 Skylake model will be more than sufficient for your needs.
I went with the MacBook because I grew tired of trying to make the iPad more than what it was originally designed to be. Steve Jobs' original pitch was that it was better at certain things than a phone or a notebook (web browsing, email, media consumption). I still think that is true, but it was never intended to be the "laptop replacement" it's being marketed as now, and for so many things it's just not that (typing, file management, multitasking).